选A还是C😰😰😱😱😱😱

选A还是C😰😰😱😱😱😱
选A还是C😰😰😱😱😱😱
 

选A还是C😰😰😱😱😱😱
选C
只有浓氨水才会挥发出碱性气体,NH3运动到右脚时溶于水,溶液变成碱性；使酚酞试液变红.